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Mastering Development

How to get individual stats from a sports dataset of matches in pandas (convert list of lists to dictionary?)?

I have a CSV dataset of tennis match results in winner, loser format that has similar structure to this one: https://www.kaggle.com/jordangoblet/atp-tour-20002016 I want to create another table that will show number of wins, losses, days since last match, average serve percentage etc. per player. A friend suggested trying something like this: games = [ [“Elliot”, […]

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Mastering Development

Create 2 subdivs of child Div and add Dynamic unique ID on Appended Child Divs?

I am currently building a blackjack game and each time I press “hit”, I run this function which appends divs that represents a card pulled from a deck. I am able to set a ID to the div, but I want each ID to increment in value… So div1, div2, div3. Currently, each div gets […]

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Mastering Development

Evaluating Specific Numbers Within a 2D Array

I’m trying to get any 2D array, and then evaluating numbers in a 2×2 square and seeing which one is the highest number. I keep getting an ArrayIndexOutOfBoundsException: 4. I mapped out how the code would execute but I don’t see how I am getting out of the bounds of the array. Anyone see the […]

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Mastering Development

Find intersection of dictionary values list

I have two dictionaries with the same keys, while the values are variant: a = {1: [1, 2, 3, 4, 5], 2: [6, 7, 8], 3: [1, 3, 5, 7, 9]} b = {1: [2, 3, 4, 7], 2: [6, 7], 3: [1, 3, 15, 10]} I’m trying to get the intersection under the same […]

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Mastering Development

Find unique elements in numpy array based on another array

I have two numpy arrays for which I’d like to find the number of unique entries in x separated by the uniqueness array u. For instance the following two arrays would return a uniqueness score of 19. x = [1, 2, 1, 0, 3, 1, 2, 2, 4, 0, 0, 1, 3, 3, 2, 1, […]

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Mastering Development

Rotate binary search tree after every insert java

I need to rotate the tree after every insert, and it goes well while I add only lesser/greater value than his parent. I mean, if I insert 6-4-3 the resulting tree after the 2 rotations will be (read that like a level order print) 3-4-6 and it’s ok, but if I add a greater value […]

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Mastering Development

Concatenating rows using for loop

I want to concatenate the rows of a data frame. I have a start and end indices where the concatenation should start and end. df = pd.DataFrame(np.random.randint(0,50,size=(100, 4)), columns=list(‘ABCD’)) df.astype(‘str’) startLoop=[1,4,7,10,13,16] endLoop=[4,7,10,13,16,19] For example, if I have a data frame that looks like below: A B C D 3 14 15 7 2 9 7 […]

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Mastering Development

Recoding data from 1,1,1, to 1,2,3

So I have this dataframe. Under the column potential_child, I want to recode the values so that the oldest child == 1, the second oldest == 2, third oldest == 3, etc. I have the ages of the children, but I am floundering how to do this exactly. DHS1 <- structure(list(person_id = c(1, 2, 1, […]

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User Help

How to create a list in Power Query from the listed values in Excel sheet, if it has a range

I am trying to modify the Excel’s Power Query with specific rows to keep by using function Table.SelectRows(…). I have the list with numbers of rows to keep and it’s working fine, however, I can’t make that list dynamic. What I want to achieve is having a cell in Excel sheet which has rows listed […]

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Mastering Development

How to force zero (0) to the center of an axis in matplotlib

I’m trying to plot percent change data and would like to plot it such that the y axis is symmetric about 0. i.e. 0 is in the center of the axis. import matplotlib.pyplot as plt import pandas as pd data = pd.DataFrame([1,2,3,4,3,6,7,8], columns=[‘Data’]) data[‘PctChange’] = data[‘Data’].pct_change() data[‘PctChange’].plot() This is different from How to draw axis […]